20210102010021 has 24 divisors (see below), whose sum is σ = 34195942550304. Its totient is φ = 10498754290080.

The previous prime is 20210102010013. The next prime is 20210102010041. The reversal of 20210102010021 is 12001020101202.

It is not a de Polignac number, because 20210102010021 - 2³ = 20210102010013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20210102009979 and 20210102010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210102010011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6249256890 + ... + 6249260123.

It is an arithmetic number, because the mean of its divisors is an integer number (1424830939596).

Almost surely, 2^{20210102010021} is an apocalyptic number.

20210102010021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20210102010021 is a deficient number, since it is larger than the sum of its proper divisors (13985840540283).

20210102010021 is a wasteful number, since it uses less digits than its factorization.

20210102010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12498517041 (or 12498517034 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20210102010021 its reverse (12001020101202), we get a palindrome (32211122111223).

The spelling of 20210102010021 in words is "twenty trillion, two hundred ten billion, one hundred two million, ten thousand, twenty-one".